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diff --git a/tools/builtInChips/Keyboard.hdl b/tools/builtInChips/Keyboard.hdl
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--- a/tools/builtInChips/Keyboard.hdl
+++ /dev/null
@@ -1,23 +0,0 @@
-// This file is part of www.nand2tetris.org
-// and the book "The Elements of Computing Systems"
-// by Nisan and Schocken, MIT Press.
-// File name: tools/builtIn/Keyboard.hdl
-
-/**
- * The keyboard (memory map).
- * Outputs the code of the currently pressed key.
- *
- * The built-in chip implementation has two side effects supplied 
- * by the simulator. First, the keyboard memory map is continuously 
- * being refreshed from the physical keyboard unit. Second, it 
- * displays a keyboard icon and data entry GUI.
- */
-
-CHIP Keyboard {
-
-    OUT out[16];   // The ASCII code of the pressed key, 
-                   // or 0 if no key is currently pressed, 
-                   // or one the special codes listed in Figure 5.5.
-
-    BUILTIN Keyboard;
-}